Hydraulic hoist elevator



Oct. 10, 1950 Filed June 21, 1948 E. P. VON DOEHREN HYDRAULIC HOIST ELEVATOR 3 Sheets-Sheei 1 ATTORNEYS o E. P. VON DOEHREN HYDRAULIC HOIST ELEVATOR.

" Filed June 21, 1948 v 3 Sheets-Sheet 2 INVENTOR I BY ATTORNEYS.

0a. 10, 1950 E. P. VON DOEHREN 2,525,006

HYDRAULIC HOIST ELEVATOR Filed June 21, 1948 v s Sheets- Sheet s ATTORNEYS.

Patented Get. 10, 1950 UNITED STATES PATENT OFFICE HYDRAULIC HOIST ELEVATOR Edward P. Von Doehren, Frederick sburg, Iowa Application June 21, 1948, Serial No. 34,161

1 Claim. 1

'The invention relates to improvements in hydraulic hoist elevator. I

An object of the invention is to provide an improved portable hydraulic hoist elevator.

Another object of the invention is to provide an improved portable wheel supported hydraulic hoist elevator which may be raised and lowered by means of a hydraulic hoist associated therewith.

A further object of the invention is to provide an improved portable wheel supported hydraulic hoist elevator, together with an endless conveyor mounted in said elevator, and a prime mover for operating said endless conveyor.

A still further object of the invention is to provide an improved portable wheel supported elevator having an endless conveyor therein, and a hydraulic hoist connected to said elevator for raising and lowering the same, said device being highly eflicient in'operation and relatively inexpensive to manufacture and produce.

pf hydraulic hoist elevator including a main supporting frame I comprising spaced parallel Other objects will appear as the description proceeds.

In the accompanying drawings which form a part of this application:

Figure l is a side elevation of the improved hydraulic hoist elevator shown in lowered position attached to the rear of a truck, and said elevator being shown in dotted lines in raised position.

Fig. 2 is a plan view looking down upon the improved hydraulic hoist elevator.

Fig. 3 is an enlarged perspective view of the hydraulic hoist mechanism for the portable wheel supported elevator.

Fig. 4 is an enlarged perspective view of the front end of the elevator showing its pivotal support and hitch mechanism for attaching the same to the rear end of a truck or trailer for transporting from place to place.

Fig. 5 is a sectional view taken on the line 55 of Fi 2.

Fig. 6 is an enlarged detail view of the elevator raising and lowering boom frame, showing the reinforcing truss therefor.

Fig. '7 is a bottom plan view of the outer end of the elevator raising and lowering boom showing the flanged bearing wheel or roller su ported thereby for operatively engaging the under surface of said elevator;

Fig. 8 is a sectional view taken on the line t-8 of Fig. 2. r

Like characters of reference are used throughout the following specification and the accompanying drawings to designate corresponding parts. e

In carrying out the invention, there is shown longitudinally extending frame members 2, the same being provided with a transverse axle 3 adjacent its rear end upon which the supporting wheels 4 are mounted.

A substantially V-shape angle iron tongue,5 is bolted at 6 to the front ends of the frame members 2 and extends forwardly thereof, and sup-ports the coupling hitch I for attaching to a hitch bar 8 on a truck or tractor 9 when the elevator is to be moved from one location to another location.

Transversely extending bearing tubes ID are disposed at the front ends of the frame members 2, and are provided with the rearwardly extend-" ing attaching arms H which are affixed to the sides of the frame members 2 by means of the bolts l2. A transversely extending reinforcing angle iron plate i3 is disposed beneath and secured to'the frame members 2, and may be formed integrally with the attaching arms II if desired.

The elevator M is substantially U-shape in cross section and is of any desired length, being provided along its opposite sides with the upwardly'and outwardly extending guard rails 55. The front end of the elevatorl l is built up by aU-shape grain flap or guard IS. A hingepintle H is secured to the lower front end of the elevator it and is received inthe transversely extending bearing tubes If], for permitting the rear end of the elevator Hi to be raised or lowered by means herein more fully described.

A tubular grain discharge spout I8 is suitably supported at the rear end of the elevator M. An adjusting link is is provided at the outer end of the elevator M and cooperates with the axle '22 and adjustment nut 211 fo tightening the endless conveyor hereinafter described.

Transversely extending axles 2i and 22 are mounted at the front and rear ends of the elevator I 4, and support the pulley wheels. 23 upon which the endless conveyor belt 24 with its spaced transverse cleats Z5 is supported. The

axle 2| is extended laterally of the elevator it and supports the driving pulley 25 over which the front end of the driving belt 21 is passed. The rear end of the belt 21 extends over a pulley 28 supported upon the shaft 29 of a small prime mover such as a, gasoline engine til mounted between and at the rear ends of the frame mem-. bers 2, thus providing the power for driving the endless conveyor belt 24 positioned within the elevator I4. 7

A substantially L-shape elevating boom sup porting frame 3| is supported between the rear ends of the frame members 2, and is preferably formed of parallel extending angle iron construction, being secured to said frame members 2 by the bolts 32. Metal bracing bars 33 are secured at 34 and 35 respectively to the frame members 2 and the upper ends of the pair of angle iro members forming the L-shape boom'supporting frame 3|.

Reinforcing straps 36 are secured between the extremities of the L-shape frame 3!, being fastened by the bolts 31. Also crossed bracing strips 38 are secured between the upright portions of the frame 3|.

The base or cross members ,39 of the boom 40 are pivotally mounted in the bracket bearings ll secured by the bolts 42 to the upper ends of the upright portions of the frame 3i, and support the outwardly extendingarms 43 of the boom, which are ,wel ded;a t.,44,in position. A cross member 45 is welded .at. .46 between the boom arms 43, and a transverselyexten-ding truss plate s1 is welded 311483170 said cross members 45. H

flanged roller 29 is rotatably supported between the outer ends of the;bom arms 43 and is adapted .to supportand have rolling engagement witlrthe bottomsurface of the elevator M as it is raised .and lowered.

.Inverted U-shape supporting cradle frames are secured tothe upperend of the upright porti ons.of,.the frame 3 and provide a support for the elevator Hi when in lowered position, A chain 5| will besecured across the elevator 14 when in lowered ,positicnto lock the same in fixed positionwhile the elevator is being moved from one eleyator l 58, When the fluid in the hydraulic jack 1 .i s-released froni; pressure, the elevator M will move by gravity to the lowered position.

While the preferred embodiment of the instant invention has been illustrated and described, it will be understood that it is not intended to limit the scope of the invention thereto, as many minor changes in detail of construction may be resorted to without departure from the spirit of the inn io Having thus described my invention what I claims as new and desire to secure by Letters Patent of the United States is:

"In a hydraulic hoist elevator, a wheel-supported. mainframe, an elevator having a central longitudinally disposed depressed portion, pivotally connected tothe front end of the frame, an endless conveyor operating in said depressed portion of the elevator, an auxiliary jack frame secured at one end of themain frame, said auxiliary jack frame embodying triangular end sectionsincluding spaced vertical, bars and spaced forwardly extended bars, straps conneptingthe vertical bars and forwardlyjextended,bars securing the vertical. bars andforwardly extended bars together, a pivotedcrossbar connectingsaid vertical bars, a ipivoted vcross bar con nec ting the forwardly extended .bar s,v,a hydraulic, Jack including ,a piston ,rod, mounteddo n the latteneross bar, a boom including arms connected to the firstnientioned cross .bar a flanged roller connecting the free en'dsof, the armsof theboorn, said flanged roller adapted to mOVeDVerthe, bottom oi the depressed portion of ,thehelevatoras the boo n swings vertically, thepiston rod of thejaclgbeing connected to a cross member, of thebocm, Wherebysaid boom is operated raising or lowering said elevator. W

EDWARD P. VON DOEHREN.

REFERENCES ci'r'n'i) The following references are "of record'in the file of this patent:

v v UNITED STATES PATENTS Number Name Date 676,594 Kassel June 18,1901 1,114,425 iAdams Oct. 20,1914 2,251,667 Ehinger Aug, 5, 1941 2,389,779 Heller Nov. 27, 1945 

